Insulator



Sept. 9 1924.

J. M. .BROWN INSUMOR mm1 me. 14.

ATTORNEY Patented Sept. 9, 1924.

UNITED STATES PATENT OFFICE.

JAMES M. BROWN, F PITTSBURGH, PENNSYLVANIA, ASSIGNOR T0 WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, A CORICORATION- 0F PENNSYLVANIA.

INSULATOR.

Application filed December 14, 1918.

To all whom t may concern.'

Be it known that I, JAMES M. BROWN, a citizen of the United States, and a resident of Pittsburgh in the county of Allegheny and State of Ilennsylvania, have invented a new and useful Improvement in Insulators, of which the following is a specification.

invention relates to insulators and particularly to insulators for supporting bus-bars o-r similar conductors. i

One object of my invention is to provide a hollow insulator that shall have adjustable and lockable bus-bar supporting means and means for simply andeffectively securing the same to one end of the insulator.

Another object of my invention is to pro vide a novel single means for reinforcing a hollow insulating` pillar and for accurately positioning the latter on itsv supporting means.

In a co-pending application Serial No. 266,720 filed Dec. 14, 1918, by Karl C. Randall and assigned to the Westinghouse Electric & Mfg. Company, is disclosed a hollow insulator having both its inner and outer surfaces conforming to a dielectric field.

In practicing my invention, I provide busbar holding means that may be adjustedV universally with respect to an insulator of the above indicated character, means for locking the bus-bar in adjusted position and a single means for reinforcing the pillar and accurately positioning the same on a suitable base.

Figure 1 of the accompanying drawings is a plan View, partially in section and having the immediate bus-bar holding structure removed for the sake of clearness,'of a device embodying my invention, andV Fig. 2 is a longitudinal sectional vie-w of the same, partially in elevation and as' viewed in the direction of a bus-bar.

A hollowT insulating member 1, shown as sub-stantially of bowl shape but that may be of other shapes, and preferably formed of porcelain is provided with inwardly and outwardly projecting flanges 2 and 3 at its outer and inner ends, respectively.

A metal ring or frame 4 having a flange 5, for co-operation with the flange 3, and apertured lugs 6, is secured to a base plate or ring 7 by screws 8 that extend through the lugs 6 and into the plate 7. Bolts 9, having co-operating nuts 10, extend through the plate 7 and secure the same to a suitable Serial No. 266,704.

support, not shown. A cushioning ring 11, of felt or other suitable material, is disposed between the flanges 3 and 5.

A preferably relatively-thin-walled metal member 12, of substantially cup-shape, has its main body portion extending into and closely engaging one end of the member 1 and an outwardly-projecting Hange 14 nested between the members 1 and 7, in a recess in the outer face of the latter. The member 12 assists in mechanically reinforcing the member 1 against lateral stresses at its point of su port and serves as a centering means there or. Clamping members 16 and 17 are disposed at the outer end of the member 1` on the outside and inside, respectively, of the flange 2 and are joined together by bolts 18. A resilient cushioning washer 19, of felt or other suitable material, is interposed between the flange 2 and the member 17.

An interiorly-threaded centrally-disposed tubular portion 20, of the member 16, supports an adjustable screw-threaded stud 21 that may be locked in adjusted os-ition by a set vscrew 22 extending throng the portion 20. A pair of complemental clamping members 23, between which a bus-bar 24 is rigidly clamped, as by co-operating bolts 25 and nuts 26, are rigidly secured to the outer end of the stud 21. A plurality of pairs of longitudinal ribs 27, on thetubular portion 20, serve, not only as spacing and centering means for the members 16 and 17 with respect to the member 1, but also as reinforcing means for the portion 20 against the stresses imposed by the bolts 18 that are disposed between the ribs of the respective pairs of ribs 27.

Adjusting screw-bolts 28 extend through the member 16 to the outer surface of the flange 2'and ermit the rigid and accurate correlation o1P the insulator members, re-

. gardlessof irregularities in the members and of any deviation from true parallel in the relation between the planes of the bus-bar 24 andthe member l.V

By the above described construction a hollow refractory bus-bar insulator, of the pillar type, is adequately protected against bending-moment stresses at its base, may be quickly and accurately assembled and facilitates the accurate and effective universal adjustment of the bus-bar which it is adapted to support. By loosening the screw 22 and turning the stud 21 and by manipulating the screw-bolts 2,8, the bus-bar24 may. be adj ustedtowards, from orto any7 angular relation With respect to the member l,4 y

While I have shown and `described a particular form of my invention, changesmay be eifectedthereimyvithout departing from the spirit and scope thereof, as setforth" in the appended claims.

I claim as my inventionrL y 1. A bus-bar insulator comprising a tubula-r insulating member having an in'- Wardly-projecting annular flange adjacent to the outer open end thereof; a centrallyapertured annular metal member and a disl; coidal metal lmember disposed on the outside and on the inside, respectively, oit said flange, a bus-bar Isupporting 4member longitudinally adjustably mounted on said annular member in the aperture thereof, and a F plurality of bolts equally spaced about said supporting fmember extending through :the open 'end of the insulating member for conneotingsaid metal members and clamping the same uniformly against said Iflan-ge around saidbns-bar supporting member.

2. A bus-bar insulator comprising a tu bular `insulating member having an in-` wardly-projecting annular flange adjacent to the outer open end thereof, a centrallyapertured annular'metalzmemberand a discoidal metal `member'disposed onthe loutside'rand on the inside,l respectively, of said ilange, a bns-'bersupporting member longi-` tudinally adjustably mounted on said annular member in theaperture thereoffor varying `theipcs'ition of abus-bar relative to the insulatrlrr,` and means extending through theA open tend of the insulating membertbetween thesupporting` member and the tiran e 'for 40' "connecting said metal members and clamp` ing the same uniitormly againstsa-id flange 3. A bus-bar insulatoroomprising :a .tu-

bular insulating member having an in` wardly-projecting annular flange adjacent' Eto the outer open `end thereoeJ centrally-V aperturedmtetal'member disposed on they outside ofzsaid flange andilravin'g a tubular* reinforcing portion around saidaperture extending into' the opening in theiins'ulating finembar,y a discoidal metal member on 'the inside of said :flange having a vcentralV recess, a bus-.bar supporting member longitudinally adjustably mounted on said outer metal member inthe aperture and tubular portion thereof and movable into and from the recess in said discoidal member to vary the position otpaifbus-bar relative to the insulator, and mearisextending'through Vthe open `endiof the insulating member between the supporting member andtheiian e for connecting saidmetal members `an Clamping the same uniformly against said flange.

4. An insulator comprising a tubular insulating member having an inwardly-projeetingporti-on at one end thereof, transverse metal members disposed on opposite sides of said projecting portion, one ol said meta-l members bei-Iig provided with an internallythreaded tubular boss having longitudinally extending outer ribs, bolts disposed intermediate said ribs ltor connecting said metal members, a threaded stud disposed in said internally-threaded portion, means on the outer end of said stud 'for supporting a conduotor and a set screw extending through the Wall of said internally-threaded portion for" locking said stud in osition.

5. A bus-bar insu ator comprising va tubular insulating member having an vinwardly-projecting annular `flange adjacent to the outer open .end thereof, a centrali apertured metal member disposed on tie outside of said flange, means for adusting said metal member parallelto tlie'longitudinal axis of the insulator, a discoidal metal member on the inside of said flange, a busbar supporting member longitudinally adjstablyf mounted onlsaid'oufter metal member in the aperture vthereof to varythe position'ofa bus-bar Arelative :to the insulator and means extending through the open end ofthe insulating' member between `the supporting `member =and theV Harige for connecting said .metal Ymembers and clamping the same uniformly against said iange.

6. Abus-bar insulator comprising an insulating' member having 4anhand opening. and an inwardly-projectingannular ang'e adjacent to said opraining,,fandv conductor-supporting means including a pair of transverse metal VVnriembers4 clamped longitudinally against-opposite fsidesoVfsa-id flange and .av

membercor disposition on one! ott'` said metal members partially' insideand partially outside said insulating 'member at `said openin for adjusting movement in the direction o the longitudinal axis ofthe insulator.

In testimony whereof, I have hereunto subscribed my name this 30th day of Nov. 19118.

vJAMES M. BRWN. 

